<!Doctype html>
<html>
<head>
<meta charset="utf-8"/>
<title>list1</title>
<link rel="stylesheet"/>
<style>
.top{width:800px;height:100px}
.left{width:500px;height:1200px}
.right{width:300px;height:1200px}
</style>
</head>
<body>
<div>
<div class="top"></div>
<div class="left"></div>
<div class="right"></div>
</div>
</body>
</html>